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AgriMetThe Pacific Northwest Cooperative
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Monthly Average Reference Evapotranspiration
Following are values of monthly average reference evapotranspiration (ETr) for each AgriMet station for the period of record. These ETr values are for the alfalfa reference crop (also known as "tall crop" reference). The ETr values were computed using the Kimberly-Penman 1982 procedure. Values during the winter months roughly approximate evaporation from bare (non-snow covered) wet soil, frozen or thawed. All of the AgriMet weather stations listed below are located in irrigated agricultural (or turfgrass) environments, and represent the ET conditions found in actively growing, irrigated cropland. Units are inches of water.These values were computed by summing the average daily ETr for the month. Note that the values for February are based on the non-leap year - 28 day month. Following the monthly values is a list of station names and the period of record used for computation of the monthly average ETr values.
Station Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total ABEI 0.61 1.08 2.78 4.48 6.91 8.17 9.57 8.60 5.70 3.20 1.31 0.56 52.96 AFTY 0.44 0.82 2.03 3.50 5.34 6.73 8.24 6.89 4.40 2.37 0.83 0.37 41.96 AGKO 0.66 1.25 2.83 4.32 6.63 8.00 9.08 7.47 5.01 2.75 1.04 0.56 49.61 AHTI 0.53 1.07 2.37 3.95 6.46 7.77 8.82 8.13 5.79 3.20 1.11 0.49 49.69 ARAO 0.56 1.08 2.03 3.38 5.12 6.20 7.71 6.14 4.08 1.91 0.79 0.52 39.50 BANO 0.83 1.26 2.15 3.05 4.25 4.70 5.19 4.49 3.40 2.17 1.02 0.72 33.23 BATO 0.73 1.32 2.63 4.08 6.21 7.46 9.16 7.69 5.13 2.59 1.09 0.52 48.62 BEWO 0.70 1.14 2.66 3.68 5.57 7.06 8.46 6.54 4.24 2.22 0.99 0.57 43.81 BKVO 0.44 1.04 2.46 4.05 5.91 7.04 8.93 7.55 5.01 2.57 0.98 0.40 46.37 BOII 0.55 1.15 2.55 3.98 6.01 7.44 8.69 7.01 4.29 2.28 0.95 0.56 45.47 BRKO 1.16 1.59 2.53 3.37 4.67 5.11 4.63 4.06 3.78 2.73 1.36 0.99 35.98 CEDC 0.95 1.52 3.13 4.46 6.54 8.31 9.88 8.60 5.88 3.54 1.53 0.89 55.25 CHAW 0.25 0.68 1.63 3.18 5.68 6.81 8.72 6.88 4.49 1.64 0.43 0.20 40.58 CHVO 0.83 1.38 2.77 4.14 6.16 7.85 9.28 7.92 5.25 3.03 1.22 0.72 50.53 COVM 0.60 1.06 2.33 3.76 5.55 6.56 8.12 6.50 4.26 2.51 1.23 0.80 43.29 CRSM 0.34 0.75 1.81 3.43 5.30 6.06 7.72 6.57 3.93 1.85 0.63 0.33 38.73 CRVO 0.65 1.24 2.27 3.47 5.33 6.53 8.69 7.58 5.30 2.50 0.84 0.51 44.90 DEFO 0.36 0.90 2.16 3.45 5.50 7.04 8.61 6.72 4.13 1.78 0.59 0.30 41.55 DRLM 0.73 1.15 2.58 3.93 5.81 6.70 9.07 7.50 4.77 2.57 1.19 0.56 46.58 ECHO 0.67 1.22 2.85 4.67 7.08 9.15 11.51 9.73 6.01 3.05 1.11 0.59 57.64 EURN 0.99 1.47 3.49 4.93 7.17 9.17 10.19 8.82 6.00 3.84 1.88 0.96 58.88 FAFI 0.51 1.01 2.35 4.14 6.32 7.62 9.20 8.20 5.71 3.32 1.14 0.47 49.98 FALN 1.12 1.93 4.01 5.53 8.04 9.99 10.78 8.83 6.19 3.56 1.74 1.05 62.77 FOGO 0.47 1.03 2.04 3.23 5.19 6.34 8.02 6.79 4.56 2.11 0.72 0.41 40.92 FTHI 0.71 1.21 2.95 4.42 6.63 7.79 9.42 8.98 6.08 3.38 1.42 0.63 53.59 GDVI 0.80 1.46 3.29 4.81 7.18 8.97 10.68 8.87 5.74 3.25 1.38 0.70 57.13 GERW 0.43 1.08 2.67 4.36 6.71 8.17 9.58 7.77 5.04 2.61 0.93 0.39 49.75 GFRI 0.82 1.49 3.28 4.75 7.34 9.44 11.78 10.24 6.81 3.94 1.56 0.71 62.18 GOLW 0.44 1.04 2.48 4.05 6.44 8.27 10.25 8.76 5.58 2.65 0.80 0.41 51.16 HERO 0.72 1.33 3.10 4.91 7.33 9.19 11.18 9.64 6.03 3.20 1.16 0.58 58.37 HOXO 0.44 0.95 2.18 3.69 5.83 7.25 8.54 7.14 4.60 2.06 0.63 0.37 43.68 HRFO 0.43 0.95 2.35 3.76 5.68 7.17 8.99 7.49 4.63 2.32 0.85 0.38 45.00 HRHW 0.57 1.23 2.99 4.72 7.01 8.57 9.80 8.10 5.55 2.93 1.08 0.45 53.01 HRMO 0.59 1.22 2.88 4.65 7.15 9.17 11.23 9.33 5.86 2.97 1.01 0.52 56.57 IMBO 0.74 1.22 2.44 3.88 5.69 6.99 9.27 7.97 5.05 2.61 1.11 0.65 47.61 KFLO 0.70 1.35 2.72 4.11 6.53 8.17 9.22 7.63 5.34 2.92 1.14 0.63 50.46 KTBI 0.43 0.94 2.65 4.53 7.28 8.51 10.59 9.64 6.38 3.54 1.31 0.44 56.24 LAKO 0.82 1.33 2.77 4.12 6.22 7.84 9.71 8.43 5.86 3.39 1.35 0.77 52.60 LEGW 0.74 1.31 3.06 4.90 7.19 8.73 9.98 8.53 5.50 2.88 1.14 0.59 54.55 LIDW 0.47 1.09 2.72 4.39 6.59 8.05 9.79 8.33 5.51 2.96 0.94 0.38 51.24 LORO 0.88 1.47 2.90 4.01 6.44 7.87 9.45 7.96 5.44 3.08 1.41 0.82 51.72 MALI 0.99 1.48 3.17 4.75 6.60 8.38 9.92 8.69 6.03 3.73 1.65 0.84 56.23 MASW 0.23 0.76 2.12 4.03 6.19 7.69 9.19 7.37 4.26 1.84 0.42 0.18 44.27 MDFO 0.64 1.27 2.39 3.76 5.90 7.67 9.22 7.70 5.18 2.61 0.90 0.52 47.74 MNTI 0.35 0.78 2.44 4.39 6.64 7.75 9.33 8.14 5.05 2.74 0.99 0.37 48.96 MRSO 0.80 1.27 2.79 4.21 6.25 8.03 9.90 8.71 5.91 3.08 1.24 0.63 52.84 NMPI 0.78 1.54 3.50 5.19 7.47 9.05 10.37 8.87 6.00 3.67 1.54 0.80 58.79 ODSW 0.42 1.07 2.71 4.45 6.68 8.33 10.44 9.18 6.04 3.16 0.93 0.39 53.79 OMAW 0.30 0.82 2.28 4.07 6.10 7.41 9.06 7.33 4.68 2.15 0.59 0.26 45.06 ONTO 0.55 1.23 3.09 4.99 7.54 9.10 10.91 9.33 6.12 3.39 1.20 0.61 58.05 PARO 0.42 0.95 2.14 3.58 5.46 6.87 8.37 6.83 4.36 1.97 0.64 0.34 41.93 PCYO 0.60 1.11 2.30 3.45 5.25 6.60 8.53 7.24 4.63 2.31 0.89 0.43 43.35 PICI 0.54 1.07 2.52 4.11 6.53 8.00 9.71 8.34 5.38 3.01 1.13 0.44 50.78 PMAI 0.63 1.30 3.16 4.94 7.24 8.56 9.82 8.29 5.50 3.18 1.26 0.67 54.54 PNGO 0.41 0.94 2.14 3.58 5.66 7.12 8.65 6.76 4.25 1.89 0.67 0.36 42.42 POBO 1.10 1.48 2.78 4.01 5.99 7.76 9.59 8.00 5.48 3.29 1.71 1.19 52.36 RDBM 0.35 0.78 1.97 3.45 5.22 6.01 7.57 6.02 3.62 1.77 0.60 0.34 37.70 RPTI 0.84 1.39 3.14 4.83 7.06 8.51 9.83 8.71 5.92 3.65 1.58 0.75 56.19 RTHI 0.48 0.83 1.52 3.53 5.79 6.56 8.66 7.08 5.25 2.45 0.81 0.40 43.35 RXGI 0.45 0.93 2.48 4.23 6.40 7.44 8.51 7.97 5.21 2.98 1.04 0.44 48.08 SIGM 0.56 0.90 2.09 3.45 5.39 6.36 8.77 7.32 4.31 2.07 0.82 0.55 42.58 TWFI 0.91 1.48 3.20 4.70 7.09 8.68 10.11 8.62 6.04 3.70 1.56 0.79 56.89 WRDO 0.75 1.45 2.94 4.25 6.44 7.69 8.47 7.47 5.14 2.87 1.16 0.67 49.28 ABEI Aberdeen, Idaho AgriMet Station Begin:1991 End: 2009 AFTY Afton, Wyoming AgriMet Station Begin:1987 End: 2009 AGKO Agency Lake, Oregon AgriMet Station Begin:2000 End: 2009 AHTI Ashton, Idaho AgriMet Station Begin:1987 End: 2009 ARAO Aurora, Oregon AgriMet Station Begin:1998 End: 2009 BANO Bandon, Oregon AgriMet Station Begin:1985 End: 2009 BATO Beatty, Oregon AgriMet Station Begin:2004 End: 2009 BEWO Bend, Oregon AgriMet Station Begin:2003 End: 2009 BKVO Baker Valley, Oregon AgriMet Station Begin:2001 End: 2009 BOII Boise, Idaho AgriMet Station Begin:1995 End: 2009 BRKO Brookings, Oregon AgriMet Station Begin:1999 End: 2009 CEDC Cedarville, California AgriMet Station Begin:1985 End: 2009 CHAW Chamokane, Washington AgriMet Station Begin:2007 End: 2009 CHVO Christmas Valley, Oregon AgriMet Station Begin:1985 End: 2009 COVM Corvallis, Montana AgriMet Station Begin:1986 End: 2009 CRSM Creston, Montana AgriMet Station Begin:1988 End: 2009 CRVO Corvallis, Oregon AgriMet Station Begin:1990 End: 2009 DEFO Dee Flat, Oregon AgriMet Station Begin:2003 End: 2009 DRLM Deer Lodge, Montana AgriMet Station Begin:1998 End: 2009 ECHO Echo, Oregon AgriMet Station Begin:1988 End: 2009 EURN Eureka, Nevada AgriMet Station Begin:2001 End: 2009 FAFI Fairfield, Idaho AgriMet Station Begin:1987 End: 2009 FALN Fallon, Nevada AgriMet Station Begin:2001 End: 2009 FOGO Forest Grove, Oregon AgriMet Station Begin:1991 End: 2009 FTHI Fort Hall, Idaho AgriMet Station Begin:1993 End: 2009 GDVI Grand View, Idaho AgriMet Station Begin:1993 End: 2009 GERW George, Washington AgriMet Station Begin:1986 End: 2009 GFRI Glenns Ferry, Idaho AgriMet Station Begin:1993 End: 2009 GOLW Goldendale, Washington AgriMet Station Begin:1991 End: 2009 HERO Hermiston, Oregon AgriMet Station Begin:1983 End: 2009 HOXO Hood River, Oregon AgriMet Station Begin:1987 End: 2009 HRFO Hereford, Oregon AgriMet Station Begin:1998 End: 2009 HRHW Harrah, Washington AgriMet Station Begin:1987 End: 2009 HRMO Hermiston (Harec), Oregon AgriMet Station Begin:1993 End: 2009 IMBO Imbler, Oregon AgriMet Station Begin:1994 End: 2009 KFLO Klamath Falls, Oregon AgriMet Station Begin:1999 End: 2009 KTBI Kettle Butte, Idaho AgriMet Station Begin:1996 End: 2009 LAKO Lakeview, Oregon AgriMet Station Begin:1988 End: 2009 LEGW Legrow, Washington AgriMet Station Begin:1986 End: 2009 LIDW Lind, Washington AgriMet Station Begin:1983 End: 2009 LORO Lorella, Oregon AgriMet Station Begin:2001 End: 2009 MALI Malta, Idaho AgriMet Station Begin:1983 End: 2009 MASW Manson, Washington AgriMet Station Begin:1994 End: 2009 MDFO Medford, Oregon AgriMet Station Begin:1989 End: 2009 MNTI Monteview, Idaho AgriMet Station Begin:1996 End: 2009 MRSO Madras, Oregon AgriMet Station Begin:1984 End: 2009 NMPI Nampi, Idaho AgriMet Station Begin:1996 End: 2009 ODSW Odessa, Washington AgriMet Station Begin:1984 End: 2009 OMAW Omak, Washington AgriMet Station Begin:1989 End: 2009 ONTO Ontario, Oregon AgriMet Station Begin:1992 End: 2009 PARO Parkdale, Oregon AgriMet Station Begin:1998 End: 2009 PCYO Prairie City, Oregon AgriMet Station Begin:1989 End: 2009 PICI Picabo, Idaho AgriMet Station Begin:1993 End: 2009 PMAI Parma, Idaho Agrimet Station Begin:1986 End: 2009 PNGO Pine Grove, Oregon Agrimet Station Begin:2003 End: 2009 POBO Powell Butte, Oregon AgriMet Station Begin:1993 End: 2009 RDBM Roundbutte, Montana AgriMet Station Begin:1989 End: 2009 RPTI Rupert, Idaho AgriMet Station Begin:1988 End: 2009 RTHI Rathdrum, ID AgriMet Station Begin:2008 End: 2009 RXGI Rexburg, Idaho AgriMet Station Begin:1987 End: 2009 SIGM St. Ignatius, Montana AgriMet Station Begin:1991 End: 2009 TWFI Twin Falls, Idaho AgriMet Station Begin:1990 End: 2009 WRDO Worden, Oregon AgriMet Station Begin:2000 End: 2009